It is not true that sleep farting is a warning for rectal cancer. When the human body is cold and cold, improper diet, suffering from intestinal inflammatory diseases and other factors can also lead to farting in bed. 1. Cold and cold: when the temperature is low or wearing less, the human body is prone to cold and cold, which will easily lead to abdominal distension, naturally farting in bed, and it is recommended to pay attention to keep warm in the near future. 2. Improper diet: Eating too much high-protein food such as beans and meat can lead to gastrointestinal indigestion, which makes it easy to fart in bed, so it is recommended to eat more fruits and vegetables. 3. Inflammatory bowel disease: chronic ulcerative colitis, bacterial enteritis and other intestinal diseases can induce intestinal flora disorders, which can lead to farting in bed. If the situation of farting in bed has not been relieved for a long time, or accompanied by other symptoms, you should go to the hospital in time to see a doctor, and give targeted treatment after clarifying the cause.